How to save file opened in libre office via terminal?

Question

linux

There is a remote computer with Linux (ubuntu) on board. Libreoffis is open on it with a new document.
There is an android on hand, slow internet and ssh access to the computer
Task: save changes to the document and upload to android.
There are no difficulties with the transfer: the same Sash or Yandex disk that is already configured.
The only question is how to save.

Answer 1

Hmmm... the first Google search turned up a link to a similar question "How can I make an open LibreOffice save a file, w...